Artificial tooth



(No Model.)

A. PAGE 80 S. S. BLOOM.

ARTIFICIAL TOOTH.

No. 445,230. Patented Jan. 27, 1891.

C 1 lllllllllhl lTE STATES PATENT OFFICE.

ARTIFICIAL TOOTH.

SPECIFICATION forming part of Letters Patent No. 445,230, dated January27, 1891.

Application filed February 6, 1890. Serial No. 339,405. (No model.)

To aZZ whont it may concern.-

Be it known that we, ALFRED PAGE, a citizen of the United States, andSAMUEL S. BLOOM, a subject of the Emperor of Russia, both residing atPhiladelphia, in the county of Philadelphia and State of Pennsylvania,have invented certain new and useful Improvements in Artificial Teeth;and we do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being badto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

Our invention relates to improvements in securing devices for unitingvulcanite or other plates to artificial teeth,and has for its object theprovision of means whereby the proportion of platina for use in theteeth before baking is reduced to a minimum while the strength andefiiciency of the work is in no way impaired.

The invention consists, essentially, in providing one or more plainstrips of platina across an opening or bore in the teeth,which strip orstripsare made to engage, and by the aid of a suitable solder or cementto securely hold, a pin, which can be attached after annealing theteeth, and which projects out beyond the inner side of the teeth toengage the vulcanite or other plate and thus render the union betweenthe teeth and the plate reliaable and secure.

The following detailed description will fully disclose the nature andpurpose of our said invention, and the manner in which we carry the sameinto effect.

The accompanying drawings illustrate our invention.

Figure l is an interior elevation of a group of teeth and gums, showingthe openings or bores and the platina strip or strips crossing them.Fig. 2 is a section through Fig. 1, on line w, showing a pin in place.Fig. 3 is an elevation of the pin employed with this form of strip. Fig.3 is an elevation of a modified form of pin shown in Fig. 3. Fig. 4 isan elevation of the same pin, taken at right angles to Fig.

Similar letters of reference indicate corresponding parts in all thefigures where they occur.

A is the tooth and gum, made of porcelain or other similar materialbaked or annealed in the usual manner. In the rim or ridge on the innerside we provide openings a. a, of a suitable depth an d size to receiveone or more transverse plat-ina strips, and a pin which is to be engagedtherewith. In the teeth when being molded the platina strips, which aremarked 1) b, are placed across the openings at a, and when the teeth arebaked the strips will be held securely in place.

\Ve may employ the platina strips, as shown to the left hand in Fig. l,or one only, as shown at the right in same figure. Vith the T-head orhalf-T head we prefer two strips of platina in each opening, which areset a little distance apart and a short distance from the bottom orfront wall of the opening, and a pin 0, having a T or half-T head 0 onits lower or engaging end, is employed to engage the strips. The headprojects beyond the shank or shaft of the pin in two directions,but isof the same width as the shank or shaft in the opposite directions, sothat it can he slipped in between the strips, and when the head haspassed then can be turned crosswise back of them, as shown in Fig. 2,and by means of solder or some suitable cement, as before mentioned, besecurely and firmly fixed in the teeth and will rtnder the union betweenthe teeth and the vulcanite plate very reliable. The projections,whether in the form of a re- 8 5 cess, as c, or a bent end or head areprovided for giving a positive hold of the pin upon the strips.

It will be seen that the quantity of platina employed is very small, andthat therefore the cost of the teeth is reduced, since the pins 0 can bemade of less expensive material, as they do not need to be set in placeuntil the teeth are annealed.

Having thus described our invention, what 5 we claim, and desire tosecure by Letters Patent, is-

1. An artificial tooth having an opening in the side thereof, and astrip or strips of platina extending about centrally across saidopening, in combination with a pin having a stem In testimony whereof weaffix our signatures provided With a proj eetion on the inner end for inpresence of two Witnesses. engaging the strip or strips, as set forth.

2. The combination of an artificial tooth ALFRED PAGE. 5havinganopening,asdeseribed,andprovided SAMUEL S. BLOOM.

with a pair of platina strips crossing such opening,with a space betweenthem,with a pin \Vitnesses: having a T-head on its inner end for inser-THOS. D. MOWLDS, tion between and beyond and in engagement FREDK. J.LAMBERT.

10 with the strips by turning the pin, as set; forth.

